Kenmore Model 54, stitch length adjuster not working
The adjuster knob had been working. Until today. When I turned it to 5, there was the usual resistance, then a click and the knob kept turning. The stitches are now large, and turning the knob does not change the length. If I press and hold the Reverse button, and turn the knob 1/4 turn clockwise, the button remains in the pressed position. When I back the knob 1/4 turn counter-clockwise, the Reverse button releases. So I know these two functions are connected. But I cannot figure out how to re-engage the knob, or whatever it is that has to be done to make the knob make the stitches smaller.
Does anyone have any advice for me? Thank you.